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Just bought one

That leads me to another question. The previous owner gave me a dump tube to replace the convertor. Now, I'm not subject to emissions testing here so I'm thinking about putting it on in place of the convertor.My question is does this change the way the O2 sensor reacts? Does it make the O2 sensor slow to react or cause the ECM to stay in open loop? If so do I need to buy a heated O2 sensor?
 
WS6 said:
That leads me to another question. The previous owner gave me a dump tube to replace the convertor. Now, I'm not subject to emissions testing here so I'm thinking about putting it on in place of the convertor.My question is does this change the way the O2 sensor reacts? Does it make the O2 sensor slow to react or cause the ECM to stay in open loop? If so do I need to buy a heated O2 sensor?
Click to expand...


Heck no, Your car will love having the backpressure released. Have TurboTweak.com burn you a chip, and it will all be soooo sweet.
They sound bad ass when they are open too. Think about an electric dump for this year's stocking stuffer, you will love popping it open on nonsuspecting victims! Heated 02s are generally used when running leaded race gas. :arab:
electricCutout.jpg
 
sverble said:
Have TurboTweak.com burn you a chip, and it will all be soooo sweet.
They sound bad ass when they are open too. Think about an electric dump for this year's stocking stuffer, you will love popping it open on nonsuspecting victims! Heated 02s are generally used when running leaded race gas. :arab:
Click to expand...

Oh, you don't know the half of it when it comes to my stocking stuffer list:cheers: Turbo tweak's chip is next in the hopper and that'll be next week. I'm still waiting on info from the previous owner to some cam specifics and I need to go out and pace this car with a known accurate speedometer car so Eric has all the accurate info to burn me a chip. I've decided that I'll get a chip/injector combo from him. The manuals and the scanmaster have been bought and should be here.
My question about the O2 sensor stems from some of the header users(TPI cars) that complain about sluggish O2s after freeing up the exhaust, specifiacally guys that lose thier convertors.

To address a question that someone asked about how fast do I want to go? Well, personnally the car is plenty fast for the little that I've driven it and 1/4 mile times is something that I haven't thought about doing with anything else I've ever owned. But these cars BEG to be raced and I want to be able to cover any street threats in the way of factory exotic Mustangs and Vettes.And I don't want to sweat any LS1 or LS2s.
Because the car has been tinkered with in the way of a cam,some porting,stall convertor,transpack,fuel pump/wire kit and gearing. I feel I need to bring it all together and solve it's wanting to run up against the knock alert box.Which If I'm reading into your guys advice it seems I'm lean under acceleration and WOT. Soooo, I'm thinking chip,injectors and tuning!


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Do you know what your fuel pressure is at WOT? Got a gauge?
On a side note, but still somewhat realted to the heated 02, I was
thinking about turning the alcy off and using a heated 02 and running C16 race gas, I've ran it before, that shit really cuts the knock out.:cold:
 
WS6 said:
That leads me to another question. The previous owner gave me a dump tube to replace the convertor. Now, I'm not subject to emissions testing here so I'm thinking about putting it on in place of the convertor.My question is does this change the way the O2 sensor reacts? Does it make the O2 sensor slow to react or cause the ECM to stay in open loop? If so do I need to buy a heated O2 sensor?
Click to expand...
Put the dump pipe on. The o2 sensor is in the header and the dump is after that. So to answer your question, no.

Don't waste your money on a heated o2 sensor. If you need a new one go to sparkplugs.com and buy Denso 234-1001
 
sverble said:
Do you know what your fuel pressure is at WOT? Got a gauge?
On a side note, but still somewhat realted to the heated 02, I was
thinking about turning the alcy off and using a heated 02 and running C16 race gas, I've ran it before, that shit really cuts the knock out.:cold:
Click to expand...
I think your external fuel pump might not be supplying the fuel anymore...
 
Quiky One said:
I think your external fuel pump might not be supplying the fuel anymore...
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his fuel pump or mine? No way for my fuel pump. It will supply more than the motor will ever use.
 
Mine's internal, and has been replaced with what I think is a Walbro unit with a Pertronix type hot wire kit.

I have a gauge on the rail and of course in park and running at idle it's 40+ .

So, how does a remote mounted fuel gauge plumb inside the car? Tell me it's not a tube off the fuel rail??
 
WS6 said:
Mine's internal, and has been replaced with what I think is a Walbro unit with a Pertronix type hot wire kit.

I have a gauge on the rail and of course in park and running at idle it's 40+ .

So, how does a remote mounted fuel gauge plumb inside the car? Tell me it's not a tube off the fuel rail??
Click to expand...


No, it's electric inside the car, then runs to sending unit under the hood which is reading from a wet source, it's surprisingly accurate and fast for an electric. I had one many years ago that was slow and not so accurate, but this one is damn near as fast as a wet gauge. I've compared it by taping a wet gauge to the winshield. Funny story, many years ago, like 92-93 I was cruising around tuning and I had a wet gauge running from the rail out from under the hood into the driver side window, under my legs, the taped to the center console. I stopped and parked the car and when I got out I brushed into the bleed valve and got a squirt of gas. Not a good thing to try.
 
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